Choke attachment for guns.



No. 847,911. PA TENTED MAR. 19, 1907. R. P. CORY.

CHOKE ATTACHMENT FOR GUNS.

APPLICATION FILED SEPT. 18,1906.

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. UNITED STATES PATENT OFFICE.

RANDOLPH P. CORY, OF ST. LOUIS, MISSOURI, ASSIGNOR OF FORTY-NINEONE-HUNDREDTHS TO JULES BARON, OF ST. LOUIS, MISSOURI.

CHOKE ATTACHMENT FOR GUNS- Specification of Letters Patent.

Patented March 19, 1907.

To all whom it may concern.-

Be it known that I, RANDOLPH P. CORY, a citizen of the United States,and a resident of St. Louis, Missouri, have invented certain new anduseful Improvements in a Choke Attachment for Guns, of which thefollowing is a specification containing a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

My invention relates to a choke attachment for guns, and is animprovement on similar devices patented by me September 19, 1889, No.633,428; December 3, 1901, No. 688,227, and December 10, 1901, No.688,389.

The object of my present invention is to generally improve theconstructions shown in the patents above referred to and to provide asimple easily-operated choke attachment which may be readily applied tothe gun-barrel.

A further object of my invention is to arrange an elongated member onthe choke attachment which will serve at a sight at the forward end ofthe gun-barrel.

To the above purposes my invention consists of certain novel features ofconstruction and arrangement of parts, which will be hereinafter morefully set forth, pointed out in the claims, and illustrated in theaccompanyin drawings, in whichigure 1 is a top plan view of the end of agun-barrel equipped with my improved choke attachment. Fig. 2 is avertical section taken on the line 2 2 of Fig. 1. Fig. 3 is across-section taken on the line 3 3 of Fig. .2, Fig. 4 is an enlargedcross-section taken on the line 4 4 of Fig. 2.

Referring by numerals to the accompanying drawings, 1 designates agun-barrel in the surface of which adjacent the forward end is formed aseries of small recesses 2.

3 designates a cylinder which forms the choke member of the attachment,the intes rior diameter of which is equal to the interior E diameter ofa gun-barrel, and the rear end of said cylinder is bored out or formedso as to receive the forward end of the barrel 1, there being aninternal shoulder 4 formed, against i which the end of said barrelengages. Passing through the rear end of the cylinder 3 is a I series ofscrews 5, the inner ends of which are reduced in diameter and engage inthe rel 'cesses 2. The outer portion of the cylinder 3 is provided witha series of radially-dis osed longitudinally-extending slots 6, whjc areof such width as that the opening through the outer end of the cylinder3 is contracted to a slight degree when the portions of said cylinderbetween said slots are uniformly moved toward one another.

Arranged to simultaneously rotate and slide longitudinally upon thecylinder 3 is a sleeve 7, the outer end of which is contracted, asdesignated by 8, which outer end bears upon the outer portion of thecylinder 3, and the exterior surface of this sleeve 7 is preferablymilled or corrugated, so that it maybe firmly grasped by the hand duringmanipulation. Formed through the rear portion of this sleeve 7 is adiagonally-disposed slot 9, the forward end of which terminates in astraight notch or recess 10, which is formed at right angles relative tothe length of said sleeve.

The sight-piece for the forward end of the gun is carried by theattachment and comprises an elongated member 11, triangular incross-section and provided at its forward end with an integral pin 12,which extends downwardly through the slot 9, and the lower end of saidpin being screw-seated in the cylinder 3.

The rear end of the sight is bent downwardly immediately to the rear ofthe sleeve 7 and is rigidly secured to the cylinder 3 by means of ascrew 13 or in any suitable man- I181.

When the parts of the attachment are assembled on the end of agun-barrel, as shown, and the sleeve 7 is moved to its rearward limit ofmovement 11 on the cylinder 3, the contracted outer end 8 of said sleevebears upon the portions of the cylinder 3 between the slots 6 therein,and thus the forward end of said cylinder 3 is contracted or choked, andas a result the charge from the gun re mains more compact and does notspread.

By making the sleeve 7 long enough to inclose the entire outer portionof the cylinder 3 and contracting the outer end of said sleeve the outerend of the cylinder 3, which is slotted, is held against expansion whenthe gun is fired, and the charge passes through the outer end of thecylinder.

When it is desired to open the choke attachment, so as to allow thecharge to spread,

the sleeve 7 is manually engaged and twisted toward the right, whichmovement causes said sleeve to simultaneously rotate and move forwardly,owing to the inclination of the slot 9, and'this action disengages thecon tracted end 8 of the sleeve 7 from the forward end of the cylinder3, and the portions of said cylinder 3 between the slots 6 will move outward to their limit of movement.

The elon ated member 11 forms a sight for the forwar end of the un, andthe entire attachment is easily an uickly placed in osition upon orremove from the gungarrel.

- I claim 1. The combination with a gun-barrel, of a cylinder detachablysecured to the end of the gun-barrel, the outer portion of whichcylinder is provided with a series of radially-disposediongitudinally-extending slcts, and a sleeve inclosing the entireslotted outer end of said cylinder and arranged to simultaneously slideand rotate thereon; substantially as specified.

2. The combination with a gunbarrel, of a c linder arranged upon theforward end I t ereof, the forward portion of which cylinderis'longitudinally slotted, a sleeve arranged to s de and rotate upon thecylinder, there being an inclined slot formed through said sleeve, andan elongated sight member fixed to the cylinder, and one end of whichmember passes through the slot'inthe sleeve;

substantlally as specified.

3. The combination with a gun-barrel, of a cylinder detachably securedto ,the outer end of the gun-barrel, the outer'portion of which cylinderis provided with a series of longitu- (finally-extending slots, a sleevehaving its forward end contracted, and which sleeve is arranged torotate and slide upon the cylinder, in which sleeve is formed adiagonallyarranged slot, and an elongated sight member fixed to thecylinder, one end of which passes through the slot in the sleeve;substantially as specified.

In testimony whereof I have signed my name to this specification inpresence of two subscribing witnesses.

RANDOLPH P. CORY.

Witnesses: M. P. SMITH, E. L. WALLACE.

